https://groups.google.com/forum/?fromgroups=#!topic/wx-dev/XkXyvMZZpDs
Really, even of you are inclined to say that MingW simply does not expose _strdup() or
strdup() when __STRICT_ANSI__
is defined, because of this in mingw's string.h:
#ifndef __STRICT_ANSI__
_CRTIMP char* __cdecl __MINGW_NOTHROW _strdup (const char*) __MINGW_ATTRIB_MALLOC;
#endif
You still have to blame the wx folks for not working around the problem which pops up when
using -std=c++0x.
It looks like wx might be poised to provide their own
#ifndef wxCRT_StrdupA
WXDLLIMPEXP_BASE char *wxCRT_StrdupA(const char *psz);
#endif
under some circumstances. This is one path to solution, but another one is to simply
provide a function prototype for _strdup() somewhere. It is not like the function has
disappeared from MingW runtime libraries. It is still there and you could link to it no
problem.